Machine for mining coal



(Nd Model.)

P. A. ARP.

I MACHINE FOR MINING GOAL, &0. No. 374,137. Patented Nov. 29, 1887.

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' UNiTED STATES PATENT OFFICE.

PETER A. ARP, OF PHILIPSBURG, ASSIGNOR OF TWO-THIRDS TO CHARLES G. WELGH, OF OSCEOLA MlLLS, AND CLEMENT B. FINLEY, OF PHILIPS- BURG, PENN SYLVA NIA.

MACHINE FOR MINING COAL, 80c.

SPECIFICATION forming part of Letters Patent No. 37%,137, dated November 29,1887.

Application filed July 28, 1886. Serial No. 209,318. (No model.)

T at whom, it may concern.-

Be it known that 1, PETER A. ARP, a citizen of the United States, residing at Philipsburg, in the county of Centre, State of Pennsylvania,

have invented a new and useful Improvement in Machines for Mining Goal, &c., which improvement is fully set forth in the following specification and accompanying drawings, in which Figure 1 represents a'partial side elevation and partial vertical section of a mining-machine embodying my invention. Fig. 2 represents a top or plan view thereof. Fig. 3 represents a transverse vertical section thereof in line 00 m, Fig. 1. Fig. 4 represents a front View of a detached part.

Similar letters of reference indicate corresponding parts in the several figures.

My invention consists of improvements in machines for mining coal, 820., embodying, first, means for guiding the auger or cutter shafts; next, cutters for breaking the walls of the coal, &c., remaining between the openings made by the angers, and, finally, scrapers for removing the chips or fragments of coal, 85c.

Referring to the drawings A represents the frame of a mining-machine, the end upright portions, A, of which form bearings for a series of sliding or traveling tubes, B, which extend horizontally in thelongitudiual direction of the machine and contain, support, andguide the rotary shaft-s G, to the forward end of each of which is secured an auger, D, and to the other end a gear-wheel, E,whereby the shafts are rotated, it being seen that when the tubes or tubular guides B are advanced, .which may be accomplished in any suitable manner, the angers are directed against and into the bank or bed of coal, &c., thus perforating the latter.

Passing freely through the bearing portion A of the frame and secured to the connectingpiece B of the tubes B are sliding bars F, which may be advanced with the tubes B and carry at their forwardends the cutters G, and are intermediate of and parallel with the augershafts C, so that the cutters are adapted to cut or break the wall of coal, &c., remaining bea tween the openings made by the angers, thus producing a continuous channel or cut from side to side of the machine. The pieceB is secured to the guides A thelatter being fitted on the horizontal rods of the frame, said guides serving to steady the tubes B as they slide on said rods and move with said tubes 13 as the machine is advanced to its work against the coal, 8pc, it being noticed that the shafts of the angers are inclosed within the tubes B and rotate therein, said tubes 13 also advancing with the angers. The tubes B inclose the shafts C and may be readily lubricated, and when the channel is formed in the bank or bed the forward ends of the tubes enter the channel without obstruction. The cutters G are of the form of chisels, each of which is constructed with two bits or cutting-edges, G G the space or distance apart from each other being approximatcly equal to the greatest diameter of the angers or the space between the angers, so that the action of the chisels is in twoplancs, touching the edges of the openings made by the angers and including approximately all of the portion of the coal, &c., left between said openiugs, thus producing the channel in the coal, &c., above referred to. Each of the cutter.- bars F carries one or more scrapers, H, which is pivoted or hung thereto in such manner as to swing from upright to horizontal positions, and vice versa, so that the scrapers yield or fold and remain out of action 011 the forward stroke of the cutters and open or assume and retain an operative position on the back or return stroke thereof, thereby removing the chips or fragments of coal, &c., from the channel, the scrapers acting, as is evident, on the bottom of said channel, and thus being effective in their work. The shoulders of the scrapers act as stops for holding the scrapers in operative position.

I am aware that drilling-machines have been constructed in which the drill has a bearing in a hollow piston-rod, the piston working in a cylinder, and such I do not claim; but I am not aware that the particular construction herein set forth, wherein a series of hollow bearings for the auger-shafts are connected togetherand with the cuttershafts, substantially as herein indicated, has ever been before used.

Having thus described my invention, what I claim as new, and desire to secure'by Letters Patent, is

- l. A mining-machine having a frame with uprightportions A, the sliding bars F, carrying the cutters G, the tubes B, the connectingpiece B, the rotary shafts 0, within the tubes B, and having angers D, the said bars F and tubes B being connected to piece B and freely passing through bearing-piece A,substantially as and for the purpose set forth.

2. A. mining-machine having a frame with I upright portions, a series of sliding tubes connected by a cross piece and freely passing through openings in said uprights, rotary shafts journaled in said tubes and adapted to slide therein, and a series of chisels intermediate of said angers and having bars connected to said cross-piece, said parts being combined substantially as described.

4. In a machine for mining coal, a recipro eating bar arranged intermediate of revolving angers and having attachable cutters provided with two cutting-edges, and hinged scrapers, said parts combined and arranged substantially as and for the purpose set forth.

In testimon y whereof I have signed my name in the presence of two witnesses: Y

' PETER A. ARP. Witnesses:

GEORGE O. SANDFQRD, ALFRED MAYER. 

